SSL WCF Service Issues - Value cannot be null

This is my first time that I’m trying to setup a service to require SSL connections. The service is accessible but when I try to run one of the methods (Using both WCF Test Client as well as a Web application) I get this error:

Failed to invoke the service. Possible causes: The service is offline or inaccessible; the client-side configuration does not match the proxy; the existing proxy is invalid. Refer to the stack trace for more detail. You can try to recover by starting a new proxy, restoring to default configuration, or refreshing the service.

Thank again YZlat! Looks like it did work after-all. Your changes led me to another issue that once I solved it seems to have everything working properly. One follow-up question for you... how can I check that the information being sent/received from the service is in fact encrypted?

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